Device for controlling power-operating mechanism



FEE. DEVICE FOR CONTROLLING POWER OPEFIATING MECHANISM.

APPLICATION FILED APR. I5, I919.

Patented Nov. 23, 1920.

l matinee.

FRANCIS FEE, QFNENCASTLE-UPON-TYNE, ENGLAND, ASSIGNOR TO SIR W. G. ARM- I STRONG, WHITWORTH AND CO1VIPANY, LITIEITED, 0F NEWCASTLE-UPON-TYNE',

ENGLAND.

v DEVICE FOR CONTROLLING POWER-OPERATING MECHANISM.

Application filed April 15,

To all whom it may concern:

' Be it known that I, FRANCIS FEE, a subject of the king of Great Britain, residing at Elswick orks, Newcastle-upon-Tyne, England, have invented a new and useful Improvement ,in Devices for Controlling Power-Operating Mechanism, of which the following is a specification.

This invention relates to improved means for controlling theasupply of liquid under pressure to mechanism operated thereby.

The invention is illustrated by the accompanying drawing.

a is a worm shaft which can be actuated by an engine I) to which liquid under pressure is supplied by pipes c, a, leading from a valve casing al. The shaft a is geared by bevel gear e,'a spindle f, and bevel gear 9, to a spindle h, on which is a quick thread 2' meshing with a similar thread cut in the interior of the boss of a handwheel j. Collars is, is, limit'the movement of the handwheel along the spindle. A control valve Z in the casing 05 is actuated by a bell crank m on which is .a roller working in a groove a cut around the boss of the wheel j.

0 is an electric motor driving a pump 39,- the amount of liquid delivered by which can be varied in well known manner by the movement'of rod 1" connected by a lever s to the piston rod 25 ofan accumulator u, the rear of the piston 1; being loaded by means of a spring w which tends to keep the amount of liquid delivered by the pump at a maximum. When the electric motor is started, liquid is pumped from a tank :0 to the accumulator u; this forces in the piston 42 and centers the pump, the liquid beingthen stored in the accumulator at a pressure determined by the strength of the spring. The first movement of the wheel j moves the valve Z admitting liquid from the ac-,

, cumulator to the engine I), turning the shaft This supply of pressure from the accumulator causes its piston-to be moved forward therein by the spring and fixes the amount of liquid delivered by the pump so as to supply just the amount of liquid required for the necessary speed of revolution of the shaft a, which speed is determined by the rate at which the handwheel j is turned. If the wheel continues to be turned, its

\ Specification of Letters Patent.

1919. Serial No. 290,242.

movement assists through spindle f the to force the piston 41 back and restore the condition in which the delivery of, the pump is a minimum.

Should it be required to turn the shaft a for some time, the handwheel may be released while the valve is open and the motion will continue until the handwheel, the motion of which will continue under these conditions, is stopped. Should the power Patented Nov, 23, 192w.

fail, the shaft a may be turned by turning the handwhcel.

What I claim is 1. The combination of an hydraulic engine, a valve adapted to control the supply of liquid thereto, a spindle geared to the engine shaft, a handle adapted to rotate the spindle and to move axially along it and means whereby such axial movement of the handle actuates the valve.

2. The combination of an hydraulic enof liquid thereto, a spindle geared to the engine shaft, a screw thread on the spindle, a handle having in it a thread meshing gine, a valve adapted to .control thesupply' liver liquid under pressure to the valve and means for driving the pump. A

.;Tl16 combination of an hydraulic engine, a valve adapted to control the supply of liquid thereto, a spindle geared to the engine shaft, a handle adapted to rotate the spindle and to move axially along it, means whereby such axial movement of the handle actuates the valve, an accumulator connected to the valve, a pump adapted to deliver liquid under pressure to the accumulator and means for driving the pump.

5. The combination of an engine operated by fluid pres 5ure, a valve adapted to control the supply of liquid to the engine, a rod geared to the engine and adapted to 10 turn therewith, a spindle arranged at right 

